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Parts used, Assembly of the rear hubs into rear arms, Assembly of the rear differential into rear block – OFNA Racing OB4 RTR User Manual

Page 12: Very important, Assembly rear block cover and rear lower arms, Insert rear belt before assembly

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Assembly of the right and left-side are
the same.

18

18

ASSEMBLY OF THE REAR HUBS INTO REAR ARMS

Leave approx 4mm

* A 3 x 8mm set screw is used
to adjust the ride height.

0 10 20 30 40 50

mm

3 x8mm
Set Screw x2

37360

37751

4mm Ball Socket x2

39060
Rear Lower
Arm

37360
4mm
Ball & Scoket

3 x 8mm
Set Screw

2 .5mm Hex Wrench

* Note direction of the arms.

2mm

* Use this hole for
37360

ASSEMBLY OF THE REAR DIFFERENTIAL INTO
REAR BLOCK

10 x 15mm
Ball Bearing x2

37450

PARTS USED

PARTS USED

37450
10 x 15mm
Ball Bearing

37450
10 x 15mm
Ball Bearing

39415
Rear Diff.
Adapter

39415
Rear Diff.
Adapter

39110
Rear Block
( Right )

* Both the left and right hand
belt tension adjuster must be place
in same position.
N0.3 is standard position.

* Check the position of the ball
differential before assembly.

1

2

3

4

5

6 7 8 9

10

11

12

13

( R )

1

2

3

4

5

6

7

8

9

10

11

12

13

( L )

1

2

3

4

5

6 7 8 9

10

11

12

13

Looser

Tighter

39110
Rear Block
( Left )

VERY IMPORTANT!

( Back View )

OPTION PARTS: 39472
Alum. Susp. Block
( Rear )

3905
Belt
Tensioner

39414
Rear Block
Cover ( Bigger )

3 x 3mm
Set Screw x2

PARTS USED

3 x 10mm
Tapping Screw x2

3 x 10mm
Tapping Screw

3 x 10mm
Tapping Screw

Assembly of the right and left-side are
the same.

ASSEMBLY REAR BLOCK COVER AND
REAR LOWER ARMS

* Insert rear belt before
assembly.

39319
150 Belt
(Rear)

* Set the 3x3mm set screw
in "D" cut.

3 x 3mm
Set Screw

38240
rear lower
arm shaft

3 x 15mm
Flat Head
Tapping Screw

3 x 15mm
Flat Head
Tapping Screw

3 x 15mm
Flat Head
Tapping Screw

3 x 15mm
Flat Head
Tapping Screw x5

19

OPTION PARTS: 39468
Alum. Rear Block
Cover